Abstract
Differential speed rolling has been applied to multi-layered Ti/Al composite sheets, obtained from accumulative roll bonding with intermediate heat treatments being applied. In comparison to conventional rolling, differential speed rolling is more efficient in strengthening the composite due to the more pronounced grain refinement. Severe plastic deformation by means of rolling becomes feasible if the evolution of common rolling textures in the Ti layers is retarded. In this condition, a maximum strength level of the composites is achieved, i.e., an ultimate tensile strength of 464 MPa, while the strain to failure amounts to 6.8%. The deformation has been observed for multi-layered composites. In combination with the analysis of the microstructure, this has been correlated to the mechanical properties.
Highlights
A key aspect in the production of composite materials lies within the possibility of combining different material properties that are attributed to the individual components of the composite.The specific objective in the development of multi-layered Ti/Al composites is the aim to combine (i) a large tensile strength; (ii) a low mass density, yielding a high specific strength and (iii) a sufficient ductility, allowing further forming processes.One prerequisite for the production of metal composites is a high forming capability
An increasing shear deformation, which is related to higher speed ratio results in a significant larger mean grain size after one differential speed rolling (DSR) pass
Differential speed rolling of Ti/Al composite sheets leads to an increased ductility due to an improved macroscopic shear strain
Summary
A key aspect in the production of composite materials lies within the possibility of combining different material properties that are attributed to the individual components of the composite.The specific objective in the development of multi-layered Ti/Al composites is the aim to combine (i) a large tensile strength; (ii) a low mass density, yielding a high specific strength and (iii) a sufficient ductility, allowing further forming processes.One prerequisite for the production of metal composites is a high forming capability. A key aspect in the production of composite materials lies within the possibility of combining different material properties that are attributed to the individual components of the composite. The specific objective in the development of multi-layered Ti/Al composites is the aim to combine (i) a large tensile strength; (ii) a low mass density, yielding a high specific strength and (iii) a sufficient ductility, allowing further forming processes. One prerequisite for the production of metal composites is a high forming capability. Accumulative roll bonding (ARB) is utilized to generate composites hardened by grain- and phase-boundaries. When ARB is applied to two different materials, the phase boundary area per volume doubles for each ARB cycle as long as the layers remain continuous. The Metals 2016, 6, 31; doi:10.3390/met6020031 www.mdpi.com/journal/metals
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
